The crown jewel of the Big Island’s glistening northwestern coast, Mauna Kea celebrated half a century in 2015. The palm-fringed resort underwent a $150 million facelift eight years ago that yielded a lobby decked with sculptures from founder Laurance Rockefeller’s collection, and a championship golf course. This year promises more luxurious updates. What remains intact is the Mauna Kea’s respect for its surroundings, its deep connection with Kauna’oa Beach, and its inimitable aloha spirit.